Though other films have entered the conversation over the years, it's largely been two in particular that have dominated the debate over the greatest movie of all time . A large swath of experts and fans will say it can only be Casablanca , while others will try to assign that highly coveted title to Citizen Kane .

It's interesting that the two movies at the forefront of this discussion were released just a year apart. In 1941, Orson Welles directed , wrote and co-starred in Citizen Kane , which was instantly hit with critical acclaim. It was handed a long list of Oscar nominations and won for one (Best Original Screenplay), but ultimately didn't take home the main prize - Best Picture.

A year later, Warner Bros. paired Humphrey Bogart with Ingrid Bergman for an epic, wartime r

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